Correct option is A
Explanation:
The correct answer is prettiest.
In this sentence, we are comparing the dress worn by the woman to all other dresses, making the superlative form of the adjective appropriate. The superlative form of "pretty" is "prettiest", which is used to describe something as being the most beautiful or attractive in a group of things.
Information Booster:
Superlative Form:
The superlative form of an adjective is used to describe the most extreme degree of a quality among three or more things. It is typically formed by adding "-est" to short adjectives (like "pretty" becoming "prettiest") or by using "most" for longer adjectives (e.g., "beautiful" becomes "most beautiful").
Example: "She wore the prettiest dress at the party."
The phrase "the prettiest dress among all" indicates that the dress is being compared to a group of dresses, meaning we need the superlative form. The superlative adjective for "pretty" is "prettiest", which conveys that her dress was the most beautiful in comparison to all others.
Adjective Forms:
Positive form: "pretty" (used for one item: "She wore a pretty dress.")
Comparative form: "prettier" (used for comparing two items: "Her dress is prettier than mine.")
Superlative form: "prettiest" (used for comparing three or more items: "She wore the prettiest dress among all.")
Examples:
"prettiest": "Among all the students, Mary is the prettiest."
"prettier": "Mary’s dress is prettier than Jane’s."
"pretty": This is the positive form of the adjective, used when no comparison is being made, but we are comparing multiple dresses, so this is not appropriate.
Additional Knowledge:
"more": This is used for the comparative form of adjectives with more than one syllable (like "more beautiful"). It doesn’t work here because we're comparing one dress to the rest, so we need the superlative form ("prettiest").
"pretty": This is the positive form of the adjective and doesn’t express comparison. It's not suitable in the context of comparing multiple dresses.
"prettier": This is the comparative form of the adjective, used for comparing two things. Since we are comparing the dress to all others (more than two), we need the superlative form, which is "prettiest".